Sometimes it's funny how people don't know the difference of frontslash '/' from blackslash '\. Now how can that be confusing?
I'd say, the easiest way to know is that if the slash is leaning to the typing direction (left to right), then it's a frontslash, backslash otherwise.
A hilarious comment from a colleague goes like, "I know, I know but which is leaning to the front? The head or the tummy?"
Har! >:D